She's called "Scar" due to the scar running from her right brow to her eyelid. Before that she was also called "Murderer" and "Grim Reaper". Unlike Ai, she controls herself as a person of perfect virtue and has no emotions.

Scar appears to be very caring persona despite all the things she has gone through in her past.

She saves Celica (Ulla's older twin sister who was frozen in time) by touching her and returning her into the flow of time. She then adopts her as her own daughter.